Question

if A:B=5:7 and B:C=6:11,then A:B:C is??
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Answer 1

Answer:

Step-by-step explanation:

a:b = 5/7 = 30/42

b:c = 6/11 = 42/77

a:b:c = 30:42:77

Answer 2

Answer:

Given :

A : B = 5 : 7

B : C = 6 : 11

To Find :

A : B : C

Solution :

We can easily find  A : B : C whenever B in both ratios are same

B in 1st ratio = 7

B in 2nd ratio = 6

LCM of 7 , 6 is 42

$\sf \dfrac{A}{B}=\dfrac{5}{7}\\\\\to \sf \dfrac{A}{B}=\dfrac{5}{7}\times \dfrac{6}{6}\\\\\leadsto \sf \dfrac{A}{B}=\dfrac{30}{42}\ \; \bigstar$

$\sf \dfrac{B}{C}=\dfrac{6}{11}\\\\\to \sf \dfrac{B}{C}=\dfrac{6}{11}\times \dfrac{7}{7}\\\\\leadsto \sf \dfrac{B}{C}=\dfrac{42}{77}\ \; \bigstar$

A : B : C = 30 : 42 : 77